Notification of puncturing a physical downlink shared channel

Abstract

Methods, systems, and devices for notifying puncturing of a physical downlink shared channel (PDSCH) are described. In some examples, a user equipment (UE) may receive, from a base station, a first control message identifying a set of resources used for transmissions by the base station. The UE may receive a second control message that includes an indication of a procedure used by the base station for a collision between the set of resources and a downlink channel transmitted to the first UE by the base station. In some examples, the UE may receive and decode signals on the downlink channel according to the indicated procedure.

What is claimed is: 
     
       1. A method for wireless communication at a first user equipment (UE), comprising:
 receiving, from a base station, a first control message identifying a set of resources used for transmissions by the base station; 
 receiving a second control message that includes an indication of a procedure used by the base station for a collision between the set of resources and a downlink channel transmitted to the first UE by the base station, the second control message includes scheduling for signals on the downlink channel; 
 receiving signals on at least a portion of the downlink channel that overlaps with at least a portion of the set of resources based at least in part on the indicated procedure being that the base station has spatially separated signals on the set of resources from signals of the downlink channel; and 
 decoding the received signals. 
 
     
     
       2. The method of  claim 1 , further comprising:
 transmitting, to the base station, a capability indication identifying that the first UE is capable of receiving the indication of the procedure used by the base station for the collision between the set of resources and the downlink channel. 
 
     
     
       3. The method of  claim 1 , wherein the set of resources comprise resources for synchronization signal blocks, control resource sets, channel state information reference signals, physical broadcast channel, system information blocks, control channels, or any combination thereof, used by the base station to transmit to at least one second UE. 
     
     
       4. The method of  claim 1 , wherein receiving and decoding the signals on the downlink channel according to the indication comprises:
 performing rate matching around the set of resources to receive the signals based at least in part on the indicated procedure being that the base station has rate matched the set of resources around signals of the downlink channel; and 
 decoding the received signals. 
 
     
     
       5. The method of  claim 1 , wherein the second control message is a second downlink control information message, the method further comprising:
 receiving a first downlink control information message that includes scheduling information for the signals on the downlink channel, wherein receiving and decoding the signals on the downlink channel according to the indication comprises: 
 receiving the signals on the downlink channel according to the scheduling information, the second downlink control information message received after receiving the signals; and 
 decoding the received signals according to the indication received in the second downlink control information message. 
 
     
     
       6. The method of  claim 5 , wherein the indicated procedure being that the base station has spatially separated signals on the set of resources from signals of the downlink channel, and decoding the received signals comprises:
 decoding the received signals of the downlink channel to remove interference from the signals on the set of resources. 
 
     
     
       7. The method of  claim 5 , wherein the indicated procedure is that the base station has punctured signals the downlink channel with signals on the set of resources, and decoding the received signals comprises:
 identifying one or more log likelihood ratio values associated with the signals on the set of resources; and 
 decoding the received signals of the downlink channel exclusive of the one or more log likelihood ratio values. 
 
     
     
       8. The method of  claim 1 , wherein the downlink channel is associated with a first transmit beam and a first cell, and the set of resources used by the base station to transmit to at least one second UE is associated with a different transmit beam, a different cell, or both. 
     
     
       9. An apparatus for wireless communication at a base station, comprising:
 a processor; 
 memory coupled with the processor; and 
 instructions stored in the memory and executable by the processor to cause the apparatus to:
 transmit, to a first user equipment (UE), a first control message identifying a set of resources used for transmissions by the base station the first control message includes scheduling information for the signals on the downlink channel; 
 transmit a second control message that includes an indication of a procedure used by the base station for a collision between the set of resources and a downlink channel transmitted to the first UE; and 
 transmit signals on the downlink channel according to the indicated procedure comprising transmit the signals on the downlink channel according to the scheduling information, the second control message transmitting after transmitting the signals. 
 
 
     
     
       10. A method for wireless communication at a base station, comprising:
 transmitting, to a first user equipment (UE), a first control message identifying a set of resources used for transmissions by the base station; 
 transmitting a second control message that includes an indication of a procedure used by the base station for a collision between the set of resources and a downlink channel transmitted to the first UE, the second control message includes scheduling for signals on the downlink channel; and 
 transmitting signals on at least a portion of the downlink channel that overlaps with at least a portion of the set of resources based at least in part on the indicated procedure being that the base station has spatially separated signals on the set of resources from signal of the downlink channel. 
 
     
     
       11. The method of  claim 10 , further comprising:
 receiving, from the first UE, a capability indication identifying that the first UE is capable of receiving the indication of the procedure used by the base station for the collision between the set of resources and the downlink channel. 
 
     
     
       12. The method of  claim 10 , wherein the set of resources comprise resources for synchronization signal blocks, control resource sets, channel state information reference signals, physical broadcast channel, system information blocks, control channels, or any combination thereof, used by the base station to transmit to at least one second UE. 
     
     
       13. The method of  claim 10 , wherein the downlink channel is associated with a first transmit beam and a first cell, and the set of resources used by the base station to transmit to at least one second UE is associated with a different transmit beam, a different cell, or both. 
     
     
       14. The method of  claim 10 , wherein transmitting the signals on the downlink channel according to the indication comprises:
 performing rate matching around the set of resources to transmit the signals based at least in part on the indicated procedure being that the base station has rate matched the set of resources around signals of the downlink channel. 
 
     
     
       15. The method of  claim 10 , wherein the second control message is a second downlink control information message, the method further comprising:
 transmitting a first downlink control information message that includes scheduling information for the signals on the downlink channel, wherein transmitting the signals on the downlink channel according to the indication comprises: 
 transmitting the signals on the downlink channel according to the scheduling information, the second downlink control information message transmitting after transmitting the signals. 
 
     
     
       16. The method of  claim 15 , wherein the indicated procedure is that the base station has spatially separated signals on the set of resources from signals of the downlink channel. 
     
     
       17. The method of  claim 15 , wherein the indicated procedure is that the base station has punctured signals the downlink channel with signals on the set of resources. 
     
     
       18. An apparatus for wireless communication at a first user equipment (UE), comprising:
 a processor; 
 memory coupled with the processor; and 
 instructions stored in the memory and executable by the processor to cause the apparatus to:
 receive, from a base station, a first control message identifying a set of resources used for transmissions by the base station; 
 receive a second control message that includes an indication of a procedure used by the base station for a collision between the set of resources and a downlink channel transmitted to the first UE by the base station, the second control message includes scheduling for signals on the downlink channel; and 
 
 receive receive signals on at least a portion of the downlink channel that overlaps with at least a portion of the set of resources based at least in part on the indicated procedure being that the base station has spatially separated signals on the set of resources from signals of the downlink channel; and 
 decode the received signals. 
 
     
     
       19. The apparatus of  claim 18 , wherein the instructions to receive and decode the signals on the downlink channel according to the indication are executable by the processor to cause the apparatus to:
 perform rate matching around the set of resources to receive the signals based at least in part on the indicated procedure being that the base station has rate matched the set of resources around signals of the downlink channel; and 
 decode the received signals. 
 
     
     
       20. The apparatus of  claim 18 , wherein the second control message is a second downlink control information message, and the instructions are further executable by the processor to cause the apparatus to:
 receive a first downlink control information message that includes scheduling information for the signals on the downlink channel, wherein receiving and decoding the signals on the downlink channel according to the indication comprises: 
 receive the signals on the downlink channel according to the scheduling information, the second downlink control information message received after receiving the signals; and 
 decode the received signals according to the indication received in the second downlink control information message. 
 
     
     
       21. The apparatus of  claim 20 , wherein the indicated procedure is that the base station has spatially separated signals on the set of resources from signals of the downlink channel, and the instructions to decode the received signals are executable by the processor to cause the apparatus to:
 decode the received signals of the downlink channel to remove interference from the signals on the set of resources. 
 
     
     
       22. The apparatus of  claim 20 , wherein the indicated procedure is that the base station has punctured signals the downlink channel with signals on the set of resources, and the instructions to decode the received signals are executable by the processor to cause the apparatus to:
 identify one or more log likelihood ratio values associated with the signals on the set of resources; and 
 decode the received signals of the downlink channel exclusive of the one or more log likelihood ratio values.